JPH1084741A - Walk-type ridge grass mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a walk-type ridge grass mower by which grass mowing work is stably executed even on a stable ridge and also where rotary blades are protected. SOLUTION: The walk-type ridge grass mower is provided with a main cutter base stand 2 having a main rotary blade 43 which is arranged in the front part of a running wheel 10, fixed to a rotary shaft and horizontally or almost horizontally rotated and with a sub-rotary blade 43a which is fixed to the rotary shaft and rotated on a surface crossed with the surface of the main rotary blade 43 in a rotary direction. It also includes a mobile cutter base stand 3 arranged so as to be vertically rocking possible as against the main cutter base stand 2 and the main cutter base stand 2 and the mobile cutter stand 3 are juxtaposed in right and left by viewing a front part. A main guide wheel 21 is provide in the front part of the main rotary blade 43 and a sub-guide wheel 31 is in the front part of the sub-rotary blade 43a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a walk-type mower for ridges, and more particularly to a walk-type ridge mower that can stably mower on unstable ridges and protects a rotary blade. About the machine.

[0002]

2. Description of the Related Art For example, a hand-pushed mower equipped with a motor is used to efficiently mow weeds on rice fields and road shoulders. Conventionally, this type of mowing machine is mainly provided with a clipper-type cutting section, and usually includes one fixed-type clipper per unit.

[0003]

However, the conventional mower described above has the following problems. That is, since only one clipper was used, only one side could be cut at a time. For this reason, when mowing grass in a place such as a rice field ridge that has slopes with different angles on both sides of the upper surface, it is necessary to work back and forth many times like a slope when the upper surface is finished, so efficiency is reduced. It was bad. Also, hair clippers are structurally complex and tend to be clogged with grass, and the speed of cutting is slow. In addition, the blade wears quickly and cannot be cut in a short time. Furthermore, the grass was cut long without being cut finely, and it was unsightly because it remained on the cut surface, and the cut grass rotted so slowly that the grass remained and was in the way.

[0004] The upper surface of the ridge is narrow and has many irregularities. Moreover, in many cases, the upper surface is convex and both sides are inclined in the direction of the paddy, so that the mowing work must be performed in an unstable state at all times. Therefore, unlike the case of mowing grass in a wide and flat place, a mowing machine for ridges requires running stability.
In addition, foreign matters such as concrete piles and stones for boundaries are present on the ridge surface. These foreign substances are hidden by the grass and are difficult to see, and if they come into direct contact with the rotary blade, they will hurt the rotary blade. In addition, the mowing machine may bend forward during mowing work, but if there is no support in front, it will bite mud and foreign matter,
There is a risk of damaging the rotary blade.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a walking-type mower for ridges capable of stably mowing even on unstable ridges. Another object of the present invention is to detect in advance that there is a foreign substance such as a concrete pile or a stone for a boundary of a ridge surface which is hidden by grass and is difficult to see, thereby preventing direct contact with the rotary blade. An object of the present invention is to provide a walking type mower for ridges. Still another object of the present invention is to provide a walking type in which even when a mower is turned forward during mowing work, the turning blade is prevented from being turned forward and the pain of the rotary blade caused by biting mud or foreign matter is prevented. An object of the present invention is to provide a mower for ridges.

[0006]

Means of the present invention taken to solve the above problems are as follows. That is, the present invention provides a main cutter base provided with a main rotating blade that is disposed in front of a traveling wheel and is fixed to a rotating shaft and horizontally or substantially horizontally rotates, and a main cutter base fixed to a rotating shaft and having the main rotating blade. A movable cutter base provided with an auxiliary rotary blade rotatable on a plane intersecting with a plane in the rotational direction, the movable cutter base being mounted so as to be able to swing up and down with respect to the main cutter base. The stand and the movable cutter base are walking-type mowing mowers arranged side by side in front view, and the mowing machine includes a main guide wheel provided in front of the main rotating blade, And a sub guide wheel provided in front of the sub rotary blade.

[0007]

[Function] The angle between the main cutter base and the movable cutter base is adjusted according to the mowing work surface. If the work surface is a ridge and is composed of a substantially horizontal upper surface and a slope inclined downward, the movable cutter base is inclined downward and set substantially parallel to the slope.

When the mowing machine is run on the upper surface of the ridge, the main rotary blade provided on the main cutter base cuts the grass on the upper surface of the ridge, and at the same time, the auxiliary rotary blade provided on the movable cutter base becomes Mow the grass on the slope of the ridge. It is desirable that the rotating blades are rotated in mutually opposite directions so as to embrace the grass inside, but are not limited.

The main guide wheel is provided in front of the main rotary blade, and a traveling device is disposed behind the main rotary blade. The auxiliary guide wheel is provided in front of the auxiliary rotary blade. Therefore, both the main guide wheels and the sub guide wheels can have a longer wheelbase between the traveling wheels and can secure straight running stability when traveling. Therefore, mowing work can be performed while maintaining straight running stability even on a ridge where the width is narrow and there are many irregularities, and in many cases, the upper surface is convex and both sides are inclined toward the paddy field. In addition, foreign objects such as concrete piles and stones at the boundary of the ridge surface, which are hidden by the grass and are difficult to see, hit the main guide wheels and sub guide wheels before hitting the rotary blade, so that their presence can be detected in advance and appropriate It is possible to take various avoidance measures. Furthermore, even if the mowing machine is turned forward during mowing work, the main guide wheels and the sub-guide wheels support the mowing machine, so that turning can be prevented, and rotation caused by biting mud and foreign matter can be prevented. The pain of the blade can be prevented.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the embodiments shown in the drawings. FIG. 1 is a perspective view showing a first embodiment of a mower according to the present invention, FIG. 2 is an explanatory view of a main part of means for driving a rotary blade, and FIG. 3 is an angle adjusting device for a main cutter base and a movable cutter base. FIG. 4 shows a relationship between a main cutter base having a main rotary blade, a movable cutter base having a sub rotary blade, and a transmission shaft interlocking the main rotary blade and the sub rotary blade. FIG.

Reference numeral C1 denotes a mower equipped with a self-propelled base 1. The self-propelled base 1 includes a frame F (shown in FIG. 3),
A motor E is mounted on the frame F. Running wheels 10 are provided below the frame F. The traveling wheels 10 are driven by a prime mover E via a drive transmission unit 11 including pulleys and belts.
, And can be easily replaced with traveling wheels of different diameters prepared separately. Reference numeral 12 denotes a handle provided with a brake, a clutch operation unit, and the like.

At the front of the frame F, a main cutter base 2 is mounted horizontally. The main cutter base 2 is a rectangular plate, and a cover 20 is attached to one side edge thereof.
A guide wheel 21 is provided at the front of the main cutter base 2 via a mounting member 210. On the guide wheel 21,
A cutting height adjusting means having a structure similar to that of a guide wheel 31 described later is provided.

A movable cutter base 3 is attached to the other side edge of the main cutter base 2 via a hinge 29 so as to be vertically swingable. A cover 3 is provided on the side edge of the movable cutter base 3.
0 is attached. A guide wheel 31 is provided at the front of the movable cutter base 3 via a mounting member 310.
A shaft tube 311 that constitutes a cutting height adjusting means is provided at a distal end portion of the mounting member 310 in a vertical direction. A guide shaft 313 provided on the axle 312 is inserted through the shaft tube 311. The shaft tube 311 is provided with a screw type fixing tool 314 for fixing the guide shaft 313 at a required position.

Referring to FIG. At the boundary between the main cutter base 2 and the movable cutter base 3, there is provided an angle adjusting device capable of setting the angle between the two steps in a stepwise manner. The angle adjusting device has an adjusting plate 32 which is a semicircular plate. The adjustment plate 32 is set up so that almost half of the lower side is fixed to the rear end of the upper surface of the movable cutter base 3. Near the edge of the arc portion of the adjustment plate 32, a required number of engagement holes 33 arranged in an arc of the same radius centering on the hinge 29 are provided at equal intervals.

An escape portion 22 is provided at the rear edge of the main cutter base 2 so that the adjustment plate 32 can pass through.
Is formed. In addition to the structure of the present embodiment, for example, when the center angle of the adjustment plate 32 is formed slightly smaller without providing the escape portion 22 on the main cutter base 2 and the movable cutter base 3 is turned upward. The main cutter base 2 may be brought into contact with an end of the adjustment plate 32 to stop the movable cutter base 3.

The frame F is provided with pin bearings 23 corresponding to the engagement holes 33. At the tip of the pin bearing 23, an engagement pin 24, which is an engagement member that is operated to enter and exit through a wire tube T, is provided. The pin bearing 23 is attached at a position where the engaging pin 24 engages with the central engaging hole 33 when the main cutter base 2 and the movable cutter base 3 are in a parallel state. Thereby, the movable cutter base 3 can be fixed by being inclined up and down at a required angle (by stepwise adjustment) about the state parallel to the main cutter base 2.

Referring to FIG. 2 and FIG. Main cutter base 2
A main rotary blade 4 and a sub rotary blade 4a are attached to the central portions of the movable cutter base 3 and the movable cutter base 3, respectively. Bearings 40 and 40a are provided above the main rotary blade 4 and the sub rotary blade 4a, and gear boxes 41 and 41a are provided above the bearings 40 and 40a.

The main cutter base 2 is mounted on the bearings 40 and 40a.
And the movable cutter base 3, the rotating shafts 42 and 42 a are pivotally supported. Under the rotating shafts 42 and 42a, rotating blades 43 linearly arranged around the rotating shafts 42 and 42a,
43a is attached. Each of the rotary blades 43 and 43a is formed so that a portion near the center is inclined downward and a tip portion is formed horizontally.
In addition, the height of each rotary blade 43, 43a is a work surface (ground).
And it is set to be located at a suitable interval for mowing.
Further, it is also possible to adopt a structure in which the height of each rotary blade 43, 43a can be adjusted.

Bevel gears 44, 44a are attached to the upper ends of the rotating shafts 42, 42a.
a is located in the gear boxes 41, 41a. A transmission shaft 5, which is means for driving the rotary blade, is supported between the gear boxes 41, 41a via bearings 45, 45a.

The transmission shaft 5 includes a drive shaft 51 supported by the gear box 41, a driven shaft 52 supported by the gear box 41a, and a telescopic shaft 53 connecting the driven shaft 52 and the driven shaft 52. A bevel gear 54 that engages with the bevel gear 44 of the rotating shaft 42 is attached to the drive shaft 51. A pulley 55 is attached to the outer end of the drive shaft 51, and the inner end is connected to one end of a telescopic shaft 53 via a universal joint 56 as a shaft joint. The pulley 55 is driven by the prime mover E via a belt 59.

The driven shaft 52 is provided with a bevel gear 57 which meshes with the bevel gear 44a of the rotary shaft 42a. The bevel gear 57 is mounted with the bevel gear 54 and the tooth side facing each other.
Rotate in opposite directions. The inner end of the driven shaft 52 is connected to the other end of the telescopic shaft 53 via a universal joint 58.

The telescopic shaft 53 has a three-stage spline structure, and the rotary blades 4 and 4a are moved in advance of the angle between the main cutter base 2 and the movable cutter base 3 in combination with the action of the universal joints 56 and 58. Within the set range, they can be linked regardless of the angle.

The rotary blades 43, 43a of the rotary blades 4, 4a are mounted so that the blade angles thereof are shifted in plan view, and are opposite to each other so that the rotary blades 43, 43a embrace the grass. The rotary blade 43,
There is no contact when the tracks of 43a overlap. In this embodiment, the telescopic shaft 53 has a three-stage spline structure, but may have a two-stage spline structure.

FIG. 5 is an explanatory view when one of the rotary blades is used by inclining downward, FIG. 6 is an explanatory view when one of the rotary blades is used by inclining upward, and FIG. It is explanatory drawing in the case of using a wheel. The method of use and operation of this embodiment will be described with reference to the drawings.

1. As shown in FIG. 5, the slope G2 is the upper surface G1.
, The mower C1 is first placed on the upper surface G1, and the height of the guide wheels 21 and 31 is fixed to the fixture 31.
Adjust by 4 etc. Thereby, the cutting height of the rotary blade 4 is set. Next, the angle of the movable cutter base 3 is adjusted by adjusting the angle adjusting device, and the rotary blade 4a is fixed so that the blade surface of the rotary blade 43a is substantially parallel to the slope G2. As a result, the mower C1 does not fluctuate and can run stably. At this time, the telescopic shaft 53 of the transmission shaft 5 is in an extended state. When the rotary blades 4 and 4a are driven and the mower C1 is run, the grass on the upper surface G1 and the slope G2 on one side can be simultaneously mowed.

2. As shown in FIG. 6, when the slope G2 'is a slope inclined upward with respect to the horizontal plane G3, the mower C1 is first placed on the horizontal plane G3. Next, the angle of the movable cutter base 3 is adjusted by adjusting the angle adjusting device, and the rotary blade 4a of the rotary blade 4a is adjusted.
The blade 3a is fixed so that the blade surface is substantially parallel to the slope G2 ', so that stable traveling can be performed. At this time, the telescopic shaft 53 of the transmission shaft 5 is in a contracted state. If the rotary blades 4 and 4a are driven to drive the mower C1, the grass on the horizontal plane G3 and the slope G2 'can be simultaneously mowed.

3. When the upper surface G1, which is the running surface of the mower C1, is inclined to one side, if the left and right traveling wheels 10, 10 have the same diameter, the mower C1 itself is inclined, so that the straight traveling property is stabilized. However, as the vehicle travels, the vehicle gradually bends downward and the mowing work of the slope G2 cannot be performed. Therefore, it is necessary to frequently correct the direction during the operation. This requires considerable force and makes the work difficult.

Therefore, as shown in FIG. 7, by replacing the traveling wheel on the side corresponding to the lower side of the upper surface G1 with the traveling wheel 10a having a slightly larger diameter to correct the inclination of the mowing machine C1, a large-diameter traveling can be achieved. The force of the wheel 10a trying to bend upward and the force of the mowing machine C1 to fall downward due to the resistance of the mowing part and the inclination of the upper surface G1 cancel each other, and the straightness of the mower C1 is stabilized. Work efficiently.

As described above, the mower C according to the present invention is used.
According to No. 1, the mowing work such as the slope of the ridge can be performed simultaneously with the horizontal surface, so that the traveling distance of the mowing machine C1 in the work can be reduced as compared with the conventional mowing machine which can work only one side at a time, and the efficiency is improved. Work can be done.

Further, since the mowing portion is not a clipper or the like but a rotary blade, the mowing portion is unlikely to be clogged with grass, and quick work can be performed. Furthermore, since the grass is cut into small pieces and scattered on the work surface, the work surface is clean, and the cut grass is easily rotten and disappears quickly.

When the work surface is a wide plane, if the main cutter base 2 and the movable cutter base 3 are fixed and used in parallel as shown in FIG. You can cut grass.

Further, when the work surface is uneven and undulating, the movable cutter base 3 can be freely oscillated by releasing the engagement of the engaging pin 24. Following the undulating work surface, the grass can be cut down neatly.

FIG. 8 is a perspective view showing a second embodiment of the mower according to the present invention, and FIG. 9 is a perspective view of an angle adjusting device for a main cutter base and a movable cutter base. The mowing machine C2 has the same general structure as the mowing machine C1.
Here, the differences will be described.

The traveling wheel 10 of the mower C2 is a single wheel.
A guide wheel 21 provided on the main cutter base 2 is attached to a tip end of a supporting leg member 210 which is rotatably supported by a supporting member 212 by a shaft pin 211. The tip of the cutting height adjusting lever 6 is fixed to the base of the supporting leg member 210.

The base of the cutting height adjusting lever 6 is extended below the handle 12 so that the operator can operate it at hand, and a plurality of engaging portions 61 provided on the cutting height adjusting plate 60 are provided.
It is hung on. The shaft 121 of the handle 12 is inserted into the bearing tube 120. The bearing tube 120 has a fastening fixture 122 so that the height and direction of the handle 12 can be adjusted.

According to this structure, the support leg member 210 is rotated by the up and down operation of the cutting height adjusting lever 6, and the guide wheel 21 is rotated.
, That is, the cutting height of the rotary blades 43 and 43a can be adjusted. The movable cutter base 3 is detachable from the hinge 29, and the transmission shaft 5 is also detachable from the gear box 41.

Referring to FIG. In the present embodiment, there is provided a swing control device that can control the swing of the movable cutter base 3 that is swingably provided on the main cutter base 2. The swing control device has a control plate 34. The control plate 34 is set up so that almost half of the lower side is fixed to the upper surface of the movable cutter base 3. An engagement hole 341 is provided near the edge of the center of the control plate 34.

Steps 342 and 343 are provided on the side where the control plate 34 is not fixed. The steps 342 and 343 are
When the movable cutter base 3 is rotated when the movable cutter base 3 is rotated by 22.5 degrees from the horizontal, the engagement pin 36 Corresponds to the step 342, and when the angle is 45 degrees, the step 343
It is set to hit.

The frame F is provided with pin bearings 35 corresponding to the engagement holes 341. At the tip of the pin bearing 35, an engaging pin 36, which is an engaging member that is operated to enter and exit through the wire tube T, is provided. The pin bearing 35 is mounted at a position where the engaging pin 36 engages with the engaging hole 341 when the main cutter base 2 and the movable cutter base 3 are in a parallel state.

According to this, the movable cutter base 3 can swing downward from a state parallel to the main cutter base 2. That is, the engaging pin 36 and the step portions 342, 34 of the control plate 34
By the action of 3, the movable cutter base 3 swings following the angle or unevenness of the mowing slope within a range of 60 degrees from the horizontal state. In the drawings, the same or equivalent parts as those in the first embodiment are denoted by the same reference numerals.

FIG. 10 is a perspective view showing another method of using the mower according to the second embodiment of the present invention. As shown in the figure, by removing the movable cutter base 3 and the transmission shaft 5 and attaching the cover 20a to the hinge 29, a two-wheel mower C2a having one front wheel and one rear wheel is obtained. The mower C2a is suitable for mowing work in a narrow place because of its narrow width. Further, the mower C2a has a two-wheel structure with one front wheel and one rear wheel, so that it is easy to drive straight and easy to drive. It should be noted that the present invention is not limited to the illustrated embodiment. Various movable cutter bases may be provided on both sides of the main cutter base. Deformation is possible.

[0042]

The present invention has the above configuration and has the following effects. (1) The main guide wheel is provided in front of the main rotary blade, and a traveling device is disposed behind the main rotary blade. The auxiliary guide wheel is provided in front of the auxiliary rotary blade.
Therefore, both the main guide wheels and the sub guide wheels can have a longer wheelbase between the traveling wheels and can secure straight running stability when traveling. Therefore, mowing work can be performed while maintaining straight running stability even on a ridge where the width is narrow and there are many irregularities, and in many cases, the upper surface is convex and both sides are inclined toward the paddy field. (2) In addition, foreign objects such as concrete piles and stones at the boundary of the ridge surface, which are hidden by grass and are difficult to see, hit the main guide wheel and sub guide wheel before hitting the rotating blade, so their presence should be detected in advance. Yes, and appropriate avoidance measures can be taken. (3) In addition, even if the mower becomes leaning forward during mowing work, the main guide wheels and sub-guide wheels support the mower, so that forward mowing can be prevented, and mud and foreign matter can be bitten. The pain of the rotary blade caused by the above can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a mower according to the present invention.

FIG. 2 is an explanatory view of a main part of a means for driving a rotary blade.

FIG. 3 is a perspective view of an angle adjusting device for a main cutter base and a movable cutter base.

FIG. 4 shows a relationship between a main cutter base provided with a main rotary blade, a movable cutter base provided with a sub rotary blade, and a transmission shaft for interlocking the main rotary blade and the sub rotary blade, with a part being cut away. FIG.

FIG. 5 is an explanatory view in a case where one rotary blade is used by being inclined downward.

FIG. 6 is an explanatory view in a case where one rotary blade is used by being inclined upward.

FIG. 7 is an explanatory diagram in the case of using traveling wheels of different diameters.

FIG. 8 is a perspective view showing a second embodiment of the mower according to the present invention.

FIG. 9 is a perspective view of an angle adjusting device for a main cutter base and a movable cutter base.

FIG. 10 is a perspective view showing another method of using the mower according to the second embodiment of the present invention.

[Explanation of symbols]

 C1 mowing machine 1 self-propelled base 10 running wheel 2 main cutter base 3 movable cutter base 4, 4a rotary blade 5 transmission shaft E prime mover C2 mowing machine 6 cutting height adjusting lever 60 cutting height adjusting plate 32 adjusting plate 24 engaging pin 34 control plate 36 engagement pin

Claims (1)

[Claims] 1. A main cutter base (2) having a main rotary blade (43) disposed in front of a traveling wheel (10) and fixed to a rotating shaft (42) and rotating horizontally or substantially horizontally; An auxiliary rotary blade (43a) fixed to a rotary shaft (42a) and rotatable on a plane intersecting a surface in a rotational direction of the main rotary blade (43); and provided with respect to the main cutter base (2). A movable cutter base (3) mounted so as to be able to swing up and down, wherein the main cutter base (2) and the movable cutter base (3) are arranged side by side in a front view. A walk-type mower for ridges, wherein the mower comprises a main guide wheel provided in front of the main rotary blade (43).
(21) and a sub-guide wheel (31) provided in front of the sub-rotating blade (43a).